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How to detect a loop in a linked list?
... @arachnode.net That's not an optimization. If slow == fast.next then slow will equal fast on the very next iteration; it only saves one iteration at most at the expense of an additional test for every iteration.
– Jason C
Mar 5 '14 at 23:59
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How can I push a specific commit to a remote, and not previous commits?
...o note, that if you have already pushed a later SHA to that remote branch, then you will need to force push this one. Use the -f flag.
– Ian Vaughan
Jun 16 '14 at 14:42
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Can you Run Xcode in Linux?
...date). Standard GCC cannot produce Mach-O object files, but Clang can. But then you still need Apple's ld to link the final binary. Darling can run the original Xcode toolchain on Linux (but not Xcode IDE).
– LubosD
Feb 18 '16 at 13:06
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How to sparsely checkout only one single file from a git repository?
... get the full history:
- in the .git repo
- in the working tree.
But then you can do a sparse checkout (if you are using Git1.7+),:
enable the sparse checkout option (git config core.sparsecheckout true)
adding what you want to see in the .git/info/sparse-checkout file
re-reading the working...
Why do we check up to the square root of a prime number to determine if it is prime?
...a * b
Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smaller than the square root of n, and if we can't find any factors less than or equal to t...
How to install Homebrew on OS X?
...ecking for homebrew installation"
which -s brew
if [[ $? != 0 ]] ; then
echo "Homebrew not found. Installing..."
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
else
echo "Homebrew already installed! Updating..."
b...
“unrecognized import path” with go get
...ATH=$PATH:$GOROOT/bin
Make sure to remove the old references of GOROOT.
Then try installing web.go again.
If that doesn't work, then have Ubuntu install Go for you.
sudo apt-get install golang
Video tutorial:
http://www.youtube.com/watch?v=2PATwIfO5ag
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AWS S3: The bucket you are attempting to access must be addressed using the specified endpoint
...
Check your bucket location in the console, then use this as reference to which endpoint to use:
http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region
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How do I type using my keyboard on the iphone simulator?
...s fixed it.
Quit the simulator.
Go to finder and press (command+shift+G) then navigate ~/Library/Preferences.
Move com.apple.iphonesimulator.plist to the trash.
Try launching your iPhone app in the simulator again.
share...
How do I declare a 2d array in C++ using new?
...;
for(int i = 0; i < sizeY; ++i) {
ary[i] = new int[sizeX];
}
and then clean up would be:
for(int i = 0; i < sizeY; ++i) {
delete [] ary[i];
}
delete [] ary;
EDIT: as Dietrich Epp pointed out in the comments this is not exactly a light weight solution. An alternative approach woul...